Shared ground
These verses are written as a closing verdict over Joshua 13–21, not as a new story episode. The repeated subject is Yahweh: he gave the land, gave rest, and delivered enemies (vv. 43–44). Israel’s part is described as receiving, then actually taking possession and settling (v. 43).
The summary is emphatic. The word “all” shows up repeatedly, and v. 45 states the point in the broadest terms: none of Yahweh’s “good” promises to Israel failed; everything came about. In the flow of Joshua, this is meant to interpret the allotment lists and town lists the reader just finished.
Where interpretation differs (only where needed)
1) What “all the land” means (v. 43). Some read this as claiming the entire promised territory was already in Israel’s effective control at that time. Others understand “all the land” as “the land that had just been apportioned/assigned,” even if some places still had resistance or incomplete occupation.
2) What “rest round about” means (v. 44). Some take “rest” as close to total peace and total security. Others take it as the end of major coalition warfare and a relative stability that made settlement possible, without implying the absence of future conflicts.
3) How absolute the enemy language is (v. 44). “Not a man … stood before them” can be read as absolute (no enemy ever resisted successfully). Others read it as summary language: in the key campaigns that established Israel’s settlement, enemies could not ultimately prevent Israel from taking root.
Why the disagreement exists
The passage uses sweeping, summary wording (“all,” “not a man,” “all came to pass”) at the end of a long section. Readers then compare that to other biblical statements about remaining peoples in the land and later wars. The question becomes whether Joshua 21:43–45 is intended as a total, once-for-all completion statement, or as an overall assessment of the main phase of conquest and settlement.
What this passage clearly contributes
Explicitly, the text claims that Yahweh kept what he swore to Israel’s ancestors, resulting in Israel possessing and living in the land, having “rest” from surrounding threats, and experiencing the reliability of Yahweh’s spoken promises (vv. 43–45). Theologically, it frames Israel’s settlement as promise-fulfillment and presents Yahweh as the decisive agent behind land, security, and victory. As a concluding lens for the whole book, it anchors Joshua’s narrative claim that God’s commitments did not collapse under the pressures of warfare, geography, or opposition (see also Joshua 21:45).